Authors: M. Tyulenev, S. Markov, A. Palamarchuk, Gvozdkova

Title of the article: Direct dumping technology of stockpiled coal reserves mining along the seam VI at the Tomusinsky open pit mine

Year: 2020, Issue: 3, Pages: 18-57

Branch of knowledge: 25.00.22 Geotechnology (underground, open and construction)

Index UDK: 622.271.322.23

DOI: 10.26730/2618-7434-2020-3-18-57

Abstract: Historically, at the Tomusinsky open pit mine, seam VI was not mined out between profiles 145-185, and the coal reserves were subsequently conserved (stockpiled). As a result of the assessment calculation, it was found that the balance reserves of coal are almost 3.7 million tons. Therefore, on the assignment of the Southern Kuzbass Coal Company, at the Open Pit Mining Department of KuzSTU research was carried out to assess the technological feasibility of mining the stockpiled reserves.
Consideration of seam development options revealed two possible ways of excavation, standard for direct dumping technology: after the seam fall and after its uprising. The technology on dip operations is more widespread, has been studied in detail and initially predicted to be used. However, it had its own difficulties, in particular, at the beginning of work under this scheme, it was necessary to prepare a container for the subsequent filling of the inner blade into it; without this measure in the blade it was possible to place only part of the overburden. That is why the calculation of the option of reservoir VI treatment after the uprising was carried out, which also required additional measures: creation of a supporting heap, for which it was also necessary to work out two or three trips after the formation fall. In addition, mining of the hollow layer in the uprising involves a preliminary calculation of the stability of overburden ledges. Stability calculations showed that the high ledges, the height of 36-45 meters, to ensure the normative coefficient of stability reserve should be divided into two ledges and shifted relative to each other. Transition completely to the non-sports technology under this option possible after the first three trips, when there was formed a sufficient capacity of the inner blade. The rocks of the first two pits are poured on the base heap. Estimated time of development of the site after the uprising was 9 years.
This article discusses in detail the variant of reservoir development during the uprising and provides actual performance indicators.

Key words: direct dumping technology dragline flat seam stockpiled coal reserves open pit mining internal dump

Receiving date: 11.03.2020

Publication date: 30.11.2020

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